While emigrating to New York in the 1880s, a young Russian mouse (Fievel) is separated from his family. He matures as he learns to live on the Big Apple's dirty boulevards. The bad guys are of course cats. Excellent animation and a high-minded (though sentimental and stereotypical) plot keep it interesting for adults. Produced by Spielberg and the first big hit for the Bluth factory, a collection of expatriate Disney artists. Knowing better than to let a money-making mouse tale languish, Bluth followed with "An American Tale: Fievel Goes West."